I was just looking at the specs of the ATC blade ‘Fast
Acting’ fuses http://www.bussmann.com/library/bifs/2009.PDF;
and they aren’t all
that fast. A 15A fuse will carry 40A for 0.5 seconds, 30 amps for 1
second, and 20 amps steady state.
Al
John;
Joe
gave you good info on loads. I am using the LS1 coils, and I did have a
15A
fuse blow on one set of (3) coils. It apparently happened on startup (I
don't
recall doing anything behind the panel that may have caused it), and
apparently
under the right conditions, a high draw can occur when things are
turned
on. The engine, of course, still started and ran on the other set of
coils,
but I could tell something wasn't entirely cricket.
I
have looked for slow-blow blade-type fuses, but have not found them.
Just
as a reminder, the estimated loads are useful in sizing wires, but
circuit
protection is selected to protect the wire; not the load.
Al
-----Original
Message-----
From:
Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf
Of John Overman
Sent:
Saturday, February 17, 2007 4:15 PM
To:
Rotary motors in aircraft
Subject:
[FlyRotary] Re: CBs and fuses
Al
or anyone, speaking of fuses, I'm about to order
PTC
resettable fuses in my Velocity, and haven't been
able
to find any load values for the stock mazda
coils,
the fuel injectors, the EC2 or the EM2, Al as I
recall
you are using LS1 coils not Mazda but I haven't
come
up with anything. I even looked in the RX7 manual
to
see what size fuse Mazda used. It just says the
fuses
are listed under the cap.
John Overman
Velocity RG N711VE (reserved)
---
Al Gietzen <ALVentures@cox.net> wrote:
>
>
There certainly reasons for either CBs or fuses, and
>
I have both in my
>
plane. For my flight critical circuits I opted for
>
simple, fault tolerance
>
and fuses. I wouldn't argue with someone making a
>
different choice.
>
>
>
>
FWIW,
>
>
>
>
Al
>
>
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